Descripción

Alfa Laval reverse osmosis spiral membranes (RO) are low energy, proven solutions for concentrating feed streams, particularly heat sensitive products. The RO spiral membranes can also be used for pre-concentration prior to evaporation as well as product and water recovery from permeate streams and evaporator condensate. The two series of RO membranes have different NaCl rejection properties. The RO membranes are thin-film composite cast on either polyester or polypropylene backing paper. Proven design and membrane technology to enhance your RO process
  • Cost effective operation thanks to low energy consumption
  • Efficient – covering a broad range of salt permeabilities
  • Minimal floor space required with its compact design
  • Extremely durable – excellent chemical and thermal stability with service life up to several years
  • Flexible – available in different combinations of length, diameter and spacer size
Alfa Laval’s experience with membrane technology is as long as membrane technology itself (more than 50 years). Based on our knowledge and experience with membrane technology, we offer two series of RO membranes with different properties to match your process and application The spiral membranes, which are manufactured in house at our own special facility, are based on a unique construction of either polyester or polypropylene support material in a sanitary full-fit design that provides optimum cleaning conditions. The reverse osmosis membranes are available as both flat sheet (for screening or lab work) and spiral (larger applications) which is an advantage when you scale up. About our reverse osmosis membrane range The minuscule pores of Alfa Laval RO membranes only allow small fractions of salts to pass through along with the water, the prime component of the permeate. Certain organic compounds with low molecular weights may also pass through but only to a limited extent. However, the membrane will retain for any other components (salts, sugars, etc.) suspended or dissolved within the liquid flow. RO PE Series The RO spiral membranes of the RO PE series, RO99 and RO90, have a NaCl rejection of &ge,98% and &ge, 90% respectively. RO98 pHt™ Series This version has a pHt™ spiral membrane that tolerates temperatures and pH higher than the RO PE series. The RO98 pHt™ has a NaCl rejection of &ge, 98%. All types are USDA approved and we can offer products with Halal certificates upon request. Our RO spiral membrane materials are compliant with all major regulations All membrane materials used for both spiral-wound and flat-sheet configurations comply with EU Regulation (EC) 1935/2004, EU Regulation 10/2011 and FDA regulations (CFR) Title 21, and are suitable for use in food and pharmaceutical processing applications. Compliance also extends to the related equipment and fittings, including items such as plate-and-frame units, element housings and pumps. How it works The basic technology behind membrane filtration involves using a semi-permeable membrane to separate a liquid into two distinct streams. Pumping this liquid across the surface of the membrane creates a positive trans-membrane pressure that allows any components smaller than the porosity of the membrane to pass through, forming the permeate. Any components larger than the pore size simply cannot pass through, and remain behind in what is called the retentate. The surface of the membrane is kept free of blockages by the force of the liquid flow moving parallel to the membrane surface. Construction of the RO spiral membrane A spiral membrane comprises of a number of membrane 'envelopes' with 2 membrane sheets separated by a permeate spacer mesh, each glued to a central permeate collection tube. Between each pair of envelopes there is a spacer which creates the feed channel, allowing the feed to flow across the length of the spiral membrane, whilst the permeate passing through the membrane into the membrane envelope flows in a spiral pattern to the permeate collection tube. Red = Feed/retentate. Yellow = Permeate. The flow pattern in an RO spiral membrane where red represents the feed/retentate and yellow the permeate. . Contact us Find out how our proven reverse osmosis membranes can help you with your filtration operations. First name Last name Email Company Country Enquiry I consent to have my submitted information stored and processed in accordance with Alfa Laval privacy policy, so Alfa Laval can respond to my request. That information is stored and processed in accordance to our privacy policy. Submit . Related products MF spiral The Alfa Laval microfiltration membranes are based on more than 50 years of experience with membrane technology. about our products here. NF spiral Alfa Laval offers nanofiltration membranes for high-yield concentration and demineralization of products such as antibiotics, whey and beverage production. Learn more. UF spiral The comprehensive range of ultrafiltration spiral membranes from Alfa Laval is a popular choice for many processes applied in the food, beverage, dairy, biotech and pharmaceutical industries Lab/pilot units Alfa Laval provides small-scale units and pilot plants for testing on-site in connection with other process equipment and for testing at our own membrane and application development test centre Auxiliary membrane equipment Alfa Laval provides all you need for a complete membrane system. We also offer a wide range of ancillary equipment and fittings needed for installing and operating the membranes safely and efficiently.''